package com.yuntsg.nnsfcp.util;

import java.util.Random;

public class GeneratorCode {


    public static String generatorCode() {

        String str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        StringBuilder sb = new StringBuilder(4);
        for (int i = 0; i < 4; i++) {
            char ch = str.charAt(new Random().nextInt(str.length()));
            sb.append(ch);
        }
//        System.out.println(sb.toString());
        return sb.toString();

    }

}
